<!DOCTYPE html>



  


<html class="theme-next gemini use-motion" lang="zh-Hans">
<head>
  <meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<meta name="theme-color" content="#222">









<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
















  
  
  <link href="/lib/fancybox/source/jquery.fancybox.css?v=2.1.5" rel="stylesheet" type="text/css" />







<link href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2" rel="stylesheet" type="text/css" />

<link href="/css/main.css?v=5.1.4" rel="stylesheet" type="text/css" />


  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png?v=5.1.4">


  <link rel="icon" type="image/png" sizes="32x32" href="/images/tuzi32.png?v=5.1.4">


  <link rel="icon" type="image/png" sizes="16x16" href="/images/tuzi16.png?v=5.1.4">


  <link rel="mask-icon" href="/images/logo.svg?v=5.1.4" color="#222">





  <meta name="keywords" content="前端,布局,框架,快速开发," />





  <link rel="alternate" href="/atom.xml" title="ShaohuiのBlog" type="application/atom+xml" />






<meta name="description" content="一、什么是 Bootstrap&amp;emsp;&amp;emsp;Bootstrap 是一个前端开发框架。自定义了很多 CSS 样式和 JavaScript 插件，使用这些样式和插件可以快速做出页面。只要有 CSS 与 HTML 基础就可以使用。Bootstrap 有一个特点是响应式布局，同一个页面同时支持 PC 和移动端，浏览器兼容性也十分不错。 二、使用 Bootstrap&amp;emsp;&amp;emsp;1、基本">
<meta name="keywords" content="前端,布局,框架,快速开发">
<meta property="og:type" content="article">
<meta property="og:title" content="Bootstrap快速入门">
<meta property="og:url" content="https:&#x2F;&#x2F;huiboxs.cn&#x2F;2020&#x2F;02&#x2F;15&#x2F;Bootstrap&#x2F;index.html">
<meta property="og:site_name" content="ShaohuiのBlog">
<meta property="og:description" content="一、什么是 Bootstrap&amp;emsp;&amp;emsp;Bootstrap 是一个前端开发框架。自定义了很多 CSS 样式和 JavaScript 插件，使用这些样式和插件可以快速做出页面。只要有 CSS 与 HTML 基础就可以使用。Bootstrap 有一个特点是响应式布局，同一个页面同时支持 PC 和移动端，浏览器兼容性也十分不错。 二、使用 Bootstrap&amp;emsp;&amp;emsp;1、基本">
<meta property="og:locale" content="zh-Hans">
<meta property="og:image" content="https:&#x2F;&#x2F;huiboxs.cn&#x2F;2020&#x2F;02&#x2F;15&#x2F;Bootstrap&#x2F;20200218110651.png">
<meta property="og:image" content="https:&#x2F;&#x2F;huiboxs.cn&#x2F;2020&#x2F;02&#x2F;15&#x2F;Bootstrap&#x2F;20200218115558.png">
<meta property="og:image" content="https:&#x2F;&#x2F;huiboxs.cn&#x2F;2020&#x2F;02&#x2F;15&#x2F;Bootstrap&#x2F;20200218114339.png">
<meta property="og:image" content="https:&#x2F;&#x2F;huiboxs.cn&#x2F;2020&#x2F;02&#x2F;15&#x2F;Bootstrap&#x2F;20200218115239.png">
<meta property="og:updated_time" content="2020-02-18T10:42:09.012Z">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="https:&#x2F;&#x2F;huiboxs.cn&#x2F;2020&#x2F;02&#x2F;15&#x2F;Bootstrap&#x2F;20200218110651.png">



<script type="text/javascript" id="hexo.configurations">
  var NexT = window.NexT || {};
  var CONFIG = {
    root: '/',
    scheme: 'Gemini',
    version: '5.1.4',
    sidebar: {"position":"left","display":"post","offset":12,"b2t":false,"scrollpercent":false,"onmobile":false},
    fancybox: true,
    tabs: true,
    motion: {"enable":true,"async":false,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
    duoshuo: {
      userId: '0',
      author: '博主'
    },
    algolia: {
      applicationID: '',
      apiKey: '',
      indexName: '',
      hits: {"per_page":10},
      labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
    }
  };
</script>



  <link rel="canonical" href="https://huiboxs.cn/2020/02/15/Bootstrap/"/>





  <title>Bootstrap快速入门 | ShaohuiのBlog</title>
  








</head>

<body itemscope itemtype="http://schema.org/WebPage" lang="zh-Hans">

  
  
    
  

  <div class="container sidebar-position-left page-post-detail">
    <div class="headband"></div>

    <header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
      <div class="header-inner"><div class="site-brand-wrapper">
  <div class="site-meta ">
    

    <div class="custom-logo-site-title">
      <a href="/"  class="brand" rel="start">
        <span class="logo-line-before"><i></i></span>
        <span class="site-title">ShaohuiのBlog</span>
        <span class="logo-line-after"><i></i></span>
      </a>
    </div>
      
        <p class="site-subtitle">编程初学者</p>
      
  </div>

  <div class="site-nav-toggle">
    <button>
      <span class="btn-bar"></span>
      <span class="btn-bar"></span>
      <span class="btn-bar"></span>
    </button>
  </div>
</div>

<nav class="site-nav">
  

  
    <ul id="menu" class="menu">
      
        
        <li class="menu-item menu-item-home">
          <a href="/" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-home"></i> <br />
            
            首页
          </a>
        </li>
      
        
        <li class="menu-item menu-item-tags">
          <a href="/tags/" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-tags"></i> <br />
            
            标签
          </a>
        </li>
      
        
        <li class="menu-item menu-item-categories">
          <a href="/categories/" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-th"></i> <br />
            
            分类
          </a>
        </li>
      
        
        <li class="menu-item menu-item-archives">
          <a href="/archives/" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-archive"></i> <br />
            
            归档
          </a>
        </li>
      

      
        <li class="menu-item menu-item-search">
          
            <a href="javascript:;" target="_blank" rel="noopener" class="popup-trigger">
          
            
              <i class="menu-item-icon fa fa-search fa-fw"></i> <br />
            
            搜索
          </a>
        </li>
      
    </ul>
  

  
    <div class="site-search">
      
  <div class="popup search-popup local-search-popup">
  <div class="local-search-header clearfix">
    <span class="search-icon">
      <i class="fa fa-search"></i>
    </span>
    <span class="popup-btn-close">
      <i class="fa fa-times-circle"></i>
    </span>
    <div class="local-search-input-wrapper">
      <input autocomplete="off"
             placeholder="搜索..." spellcheck="false"
             type="text" id="local-search-input">
    </div>
  </div>
  <div id="local-search-result"></div>
</div>



    </div>
  
</nav>



 </div>
    </header>

    <main id="main" class="main">
      <div class="main-inner">
        <div class="content-wrap">
          <div id="content" class="content">
            

  <div id="posts" class="posts-expand">
    

  

  
  
  

  <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
  
  
  
  <div class="post-block">
    <link itemprop="mainEntityOfPage" href="https://huiboxs.cn/2020/02/15/Bootstrap/">

    <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
      <meta itemprop="name" content="Shaohui">
      <meta itemprop="description" content="">
      <meta itemprop="image" content="/images/tx.png">
    </span>

    <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
      <meta itemprop="name" content="ShaohuiのBlog">
    </span>

    
      <header class="post-header">

        
        
          <h1 class="post-title" itemprop="name headline">Bootstrap快速入门</h1>
        

        <div class="post-meta">
          <span class="post-time">
            
              <span class="post-meta-item-icon">
                <i class="fa fa-calendar-o"></i>
              </span>
              
                <span class="post-meta-item-text">发表于</span>
              
              <time title="创建于" itemprop="dateCreated datePublished" datetime="2020-02-15T11:53:00+08:00">
                2020-02-15
              </time>
            

            

            
          </span>

          
            <span class="post-category" >
            
              <span class="post-meta-divider">|</span>
            
              <span class="post-meta-item-icon">
                <i class="fa fa-folder-o"></i>
              </span>
              
                <span class="post-meta-item-text">分类于</span>
              
              
                <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
                  <a href="/categories/%E5%89%8D%E7%AB%AF%E6%A1%86%E6%9E%B6/" itemprop="url" rel="index">
                    <span itemprop="name">前端框架</span>
                  </a>
                </span>

                
                
              
            </span>
          

          
            
              <span class="post-comments-count">
                <span class="post-meta-divider">|</span>
                <span class="post-meta-item-icon">
                  <i class="fa fa-comment-o"></i>
                </span>
                <a href="/2020/02/15/Bootstrap/#comments" itemprop="discussionUrl">
                  <span class="post-comments-count valine-comment-count" data-xid="/2020/02/15/Bootstrap/" itemprop="commentCount"></span>
                </a>
              </span>
            
          

          
          

          

          

          

        </div>
      </header>
    

    
    
    
    <div class="post-body" itemprop="articleBody">

      
      

      
        <h4 id="一、什么是-Bootstrap"><a href="#一、什么是-Bootstrap" class="headerlink" title="一、什么是 Bootstrap"></a>一、什么是 Bootstrap</h4><p>&emsp;&emsp;<code>Bootstrap</code> 是一个前端开发框架。自定义了很多 <code>CSS</code> 样式和 <code>JavaScript</code> 插件，使用这些样式和插件可以快速做出页面。只要有 <code>CSS</code> 与 <code>HTML</code> 基础就可以使用。<code>Bootstrap</code> 有一个特点是响应式布局，同一个页面同时支持 PC 和移动端，浏览器兼容性也十分不错。</p>
<h4 id="二、使用-Bootstrap"><a href="#二、使用-Bootstrap" class="headerlink" title="二、使用 Bootstrap"></a>二、使用 Bootstrap</h4><h4 id="emsp-emsp-1、基本模板（官方文档复制）"><a href="#emsp-emsp-1、基本模板（官方文档复制）" class="headerlink" title="&emsp;&emsp;1、基本模板（官方文档复制）"></a>&emsp;&emsp;1、基本模板（官方文档复制）</h4><figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="meta">&lt;!DOCTYPE html&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span> <span class="attr">lang</span>=<span class="string">"zh-CN"</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"utf-8"</span> /&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">meta</span> <span class="attr">http-equiv</span>=<span class="string">"X-UA-Compatible"</span> <span class="attr">content</span>=<span class="string">"IE=edge"</span> /&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">meta</span> <span class="attr">name</span>=<span class="string">"viewport"</span> <span class="attr">content</span>=<span class="string">"width=device-width, initial-scale=1"</span> /&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">title</span>&gt;</span>Bootstrap 101 Template<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">link</span></span></span><br><span class="line"><span class="tag">      <span class="attr">href</span>=<span class="string">"https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css"</span></span></span><br><span class="line"><span class="tag">      <span class="attr">rel</span>=<span class="string">"stylesheet"</span></span></span><br><span class="line"><span class="tag">    /&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- HTML5 shim 和 Respond.js 是为了让 IE8 支持 HTML5 元素和媒体查询（media queries）功能 --&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 警告：通过 file:// 协议（就是直接将 html 页面拖拽到浏览器中）访问页面时 Respond.js 不起作用 --&gt;</span></span><br><span class="line">    <span class="comment">&lt;!--[if lt IE 9]&gt;</span></span><br><span class="line"><span class="comment">      &lt;script src="https://cdn.jsdelivr.net/npm/html5shiv@3.7.3/dist/html5shiv.min.js"&gt;&lt;/script&gt;</span></span><br><span class="line"><span class="comment">      &lt;script src="https://cdn.jsdelivr.net/npm/respond.js@1.4.2/dest/respond.min.js"&gt;&lt;/script&gt;</span></span><br><span class="line"><span class="comment">    &lt;![endif]--&gt;</span></span><br><span class="line">  <span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 代码写在这个位置 --&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="comment">&lt;!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">"https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">script</span> <span class="attr">src</span>=<span class="string">"https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"</span>&gt;</span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>

<h6 id="emsp-emsp-2、使用官方插件"><a href="#emsp-emsp-2、使用官方插件" class="headerlink" title="&emsp;&emsp;2、使用官方插件"></a>&emsp;&emsp;2、使用官方插件</h6><p>&emsp;&emsp;基本模板有了，怎么用呢？<code>CRM</code>（Copy Run Modify）,从官网复制实例到本地，运行正常就修改。做一个好看的轮播图用原生 <code>JS</code> 还是要花些时间，<code>Bootstrap</code> 官网的 JS 插件不错，复制过来<img src="20200218110651.png" alt="20200218110651"></p>
<p>&emsp;&emsp;通过注释可以看出图片应该是在 <code>Wrapper for slides</code> 与 <code>Controls</code> 之间。两个结构相似的代码片段，删掉其中根据页面变化可以看出下面的结构就是放置图片的地方。添加一段代码（如下）就可以多一个图片。</p>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"item"</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">img</span> <span class="attr">src</span>=<span class="string">"./image/timg_3.jfif"</span> <span class="attr">alt</span>=<span class="string">"..."</span> /&gt;</span></span><br><span class="line">  <span class="comment">&lt;!-- 修改src添加图片 --&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"carousel-caption"</span>&gt;</span></span><br><span class="line">    ...</span><br><span class="line">  <span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br></pre></td></tr></table></figure>

<p>&emsp;&emsp;只能添加三个图片？通过删除与添加会发现下面代码片段（也就是 <code>Indicators</code> 部分）是控制图片数量的，与 <code>Wrappper fo slids</code> 是对应的。添加一个 <code>li</code>，就可以多添加一个 <code>items</code> 也就是添加图片。</p>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">li</span> <span class="attr">data-target</span>=<span class="string">"#carousel-example-generic"</span> <span class="attr">data-slide-to</span>=<span class="string">"2"</span>&gt;</span><span class="tag">&lt;/<span class="name">li</span>&gt;</span></span><br></pre></td></tr></table></figure>

<p><img src="20200218115558.png" alt=""></p>
<p>&emsp;&emsp;通过复制，删除就可以轻松的使用官网的插件。</p>
<h6 id="emsp-emsp-3、使用预定义样式"><a href="#emsp-emsp-3、使用预定义样式" class="headerlink" title="&emsp;&emsp;3、使用预定义样式"></a>&emsp;&emsp;3、使用预定义样式</h6><p>&emsp;&emsp;在<a href="https://v3.bootcss.com/css/" target="_blank" rel="noopener">Bootstrap ３官方文档</a>中找到”全局 CSS 样式”，可以看到很 <code>Bootstrap</code> 预设的很多样式。以按钮为例：</p>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">a</span> <span class="attr">class</span>=<span class="string">"btn btn-default"</span> <span class="attr">href</span>=<span class="string">"#"</span> <span class="attr">role</span>=<span class="string">"button"</span>&gt;</span>Link<span class="tag">&lt;/<span class="name">a</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">button</span> <span class="attr">class</span>=<span class="string">"btn btn-default"</span> <span class="attr">type</span>=<span class="string">"submit"</span>&gt;</span>Button<span class="tag">&lt;/<span class="name">button</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">input</span> <span class="attr">class</span>=<span class="string">"btn btn-default"</span> <span class="attr">type</span>=<span class="string">"button"</span> <span class="attr">value</span>=<span class="string">"Input"</span> /&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">input</span> <span class="attr">class</span>=<span class="string">"btn btn-default"</span> <span class="attr">type</span>=<span class="string">"submit"</span> <span class="attr">value</span>=<span class="string">"Submit"</span> /&gt;</span></span><br></pre></td></tr></table></figure>

<p>&emsp;&emsp;页面中的按钮通常是以这些标签做的，默认的样式都不怎么好看。引入了 <code>Bootstrap</code> 后直接给这些标签添加 class 名如：<code>btn</code> 、<code>btn-default</code>之类的就会发现样式变成 <code>Bootstrap</code> 预定义的样式。</p>
<p><img src="20200218114339.png" alt=""></p>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="comment">&lt;!--  --&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">a</span> <span class="attr">class</span>=<span class="string">"btn btn-link"</span> <span class="attr">href</span>=<span class="string">"#"</span> <span class="attr">role</span>=<span class="string">"button"</span>&gt;</span>（链接）Link<span class="tag">&lt;/<span class="name">a</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">button</span> <span class="attr">class</span>=<span class="string">"btn btn-warning"</span> <span class="attr">type</span>=<span class="string">"submit"</span>&gt;</span>（警告）Warning<span class="tag">&lt;/<span class="name">button</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">input</span> <span class="attr">class</span>=<span class="string">"btn btn-danger"</span> <span class="attr">type</span>=<span class="string">"button"</span> <span class="attr">value</span>=<span class="string">"（危险）Danger"</span> /&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">input</span> <span class="attr">class</span>=<span class="string">"btn btn-success"</span> <span class="attr">type</span>=<span class="string">"submit"</span> <span class="attr">value</span>=<span class="string">"（成功）Success"</span> /&gt;</span></span><br></pre></td></tr></table></figure>

<p>&emsp;&emsp;可以看出，<code>Bootstrap</code> 就是通过控制样式依靠添加或者删除类名来增加或删除预设样式。</p>
<p><img src="20200218115239.png" alt=""></p>
<h4 id="三、Bootstrap-栅格系统"><a href="#三、Bootstrap-栅格系统" class="headerlink" title="三、Bootstrap 栅格系统"></a>三、Bootstrap 栅格系统</h4><p>&emsp;&emsp;前面说到，响应式布局是 <code>Bootstrap</code> 的一个特色，那么怎么做到呢？<code>Bootstrap</code> 在页面中创建行，每一行分为 12 列（有行有列，不就可以看作是栅格吗）。可以指定元素在不同分辨率下占几列。例：</p>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">div</span></span></span><br><span class="line"><span class="tag">  <span class="attr">class</span>=<span class="string">"col-lg-1 col-md-3 col-sm-6 col-xs-12"</span></span></span><br><span class="line"><span class="tag">  <span class="attr">style</span>=<span class="string">"height: 20px;background-color: pink;"</span></span></span><br><span class="line"><span class="tag">&gt;</span><span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line"><span class="comment">&lt;!--</span></span><br><span class="line"><span class="comment">	col-lg-1代表在宽度 &gt;= 1200px的屏幕，通常来说是台式机显示器下占1个格子。也就是1/12行；</span></span><br><span class="line"><span class="comment">	col-md-3代表在宽度 &lt;= 992px的屏幕，通常来说是笔记本显示器下占3个格子。也就是1/4行；</span></span><br><span class="line"><span class="comment">	col-sm-6代表宽度 &gt;= 768px的屏幕，通常来说是平板的屏幕下占6个格子。也就是一行的一半；</span></span><br><span class="line"><span class="comment">	col-xs-12代表宽度 &lt; 768px的屏幕，通常来说是手机屏幕下占12个格子。也就是一行；</span></span><br><span class="line"><span class="comment">	如果将col-lg-1去掉，那么当屏幕宽度大于768px后，无论屏幕多宽永远都只能占屏幕的一半</span></span><br><span class="line"><span class="comment">--&gt;</span></span><br></pre></td></tr></table></figure>

<p>&emsp;&emsp;如果一行没有占满，元素会右对齐，想让它居中怎么办？用偏移。</p>
<figure class="highlight html"><table><tr><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">div</span></span></span><br><span class="line"><span class="tag">  <span class="attr">class</span>=<span class="string">"col-md-6 col-md-offset-3"</span></span></span><br><span class="line"><span class="tag">  <span class="attr">style</span>=<span class="string">"height: 20px;background-color: pink;"</span></span></span><br><span class="line"><span class="tag">&gt;</span><span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line"><span class="comment">&lt;!-- 左右都会有3个格子，这样就是居中效果 --&gt;</span></span><br></pre></td></tr></table></figure>

<h4 id="总结"><a href="#总结" class="headerlink" title="总结"></a>总结</h4><p>&emsp;&emsp;<code>Bootstrap</code> 是一个入门（复制粘贴）容易，不过想完全驾驭还是需要一定水平的。网上不少人认为 Bootstrap 主要用于快速制作网页，面对项目中的设计稿通常不太适合用 <code>Bootstrap</code>。闲时学习 <code>Bootstrap</code> 的设计思想和代码分类方式对前端水平提升是非常不错的。</p>

      
    </div>
    
    
    

    

    

    

    <footer class="post-footer">
      
        <div class="post-tags">
          
            <a href="/tags/%E5%89%8D%E7%AB%AF/" rel="tag"># 前端</a>
          
            <a href="/tags/%E5%B8%83%E5%B1%80/" rel="tag"># 布局</a>
          
            <a href="/tags/%E6%A1%86%E6%9E%B6/" rel="tag"># 框架</a>
          
            <a href="/tags/%E5%BF%AB%E9%80%9F%E5%BC%80%E5%8F%91/" rel="tag"># 快速开发</a>
          
        </div>
      

      
      
      

      
        <div class="post-nav">
          <div class="post-nav-next post-nav-item">
            
              <a href="/2020/01/16/flex/" rel="next" title="flex布局">
                <i class="fa fa-chevron-left"></i> flex布局
              </a>
            
          </div>

          <span class="post-nav-divider"></span>

          <div class="post-nav-prev post-nav-item">
            
              <a href="/2020/02/22/JS-DataType/" rel="prev" title="JS 判断数据类型">
                JS 判断数据类型 <i class="fa fa-chevron-right"></i>
              </a>
            
          </div>
        </div>
      

      
      
    </footer>
  </div>
  
  
  
  </article>



    <div class="post-spread">
      
    </div>
  </div>


          </div>
          


          

  
    <div class="comments" id="comments">
    </div>
  



        </div>
        
          
  
  <div class="sidebar-toggle">
    <div class="sidebar-toggle-line-wrap">
      <span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
      <span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
      <span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
    </div>
  </div>

  <aside id="sidebar" class="sidebar">
    
    <div class="sidebar-inner">

      

      
        <ul class="sidebar-nav motion-element">
          <li class="sidebar-nav-toc sidebar-nav-active" data-target="post-toc-wrap">
            文章目录
          </li>
          <li class="sidebar-nav-overview" data-target="site-overview-wrap">
            站点概览
          </li>
        </ul>
      

      <section class="site-overview-wrap sidebar-panel">
        <div class="site-overview">
          <div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
            
              <img class="site-author-image" itemprop="image"
                src="/images/tx.png"
                alt="Shaohui" />
            
              <p class="site-author-name" itemprop="name">Shaohui</p>
              <p class="site-description motion-element" itemprop="description">记录学习生活</p>
          </div>

          <nav class="site-state motion-element">

            
              <div class="site-state-item site-state-posts">
              
                <a href="/archives/%7C%7C%20archive">
              
                  <span class="site-state-item-count">16</span>
                  <span class="site-state-item-name">日志</span>
                </a>
              </div>
            

            
              
              
              <div class="site-state-item site-state-categories">
                <a href="/categories/index.html">
                  <span class="site-state-item-count">8</span>
                  <span class="site-state-item-name">分类</span>
                </a>
              </div>
            

            
              
              
              <div class="site-state-item site-state-tags">
                
                  <span class="site-state-item-count">30</span>
                  <span class="site-state-item-name">标签</span>
                
              </div>
            

          </nav>

          
            <div class="feed-link motion-element">
              <a href="/atom.xml" rel="alternate">
                <i class="fa fa-rss"></i>
                RSS
              </a>
            </div>
          

          

          
          

          
          

          

        </div>
      </section>

      
      <!--noindex-->
        <section class="post-toc-wrap motion-element sidebar-panel sidebar-panel-active">
          <div class="post-toc">

            
              
            

            
              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-4"><a class="nav-link" href="#一、什么是-Bootstrap"><span class="nav-number">1.</span> <span class="nav-text">一、什么是 Bootstrap</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#二、使用-Bootstrap"><span class="nav-number">2.</span> <span class="nav-text">二、使用 Bootstrap</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#emsp-emsp-1、基本模板（官方文档复制）"><span class="nav-number">3.</span> <span class="nav-text">  1、基本模板（官方文档复制）</span></a><ol class="nav-child"><li class="nav-item nav-level-6"><a class="nav-link" href="#emsp-emsp-2、使用官方插件"><span class="nav-number">3.0.1.</span> <span class="nav-text">  2、使用官方插件</span></a></li><li class="nav-item nav-level-6"><a class="nav-link" href="#emsp-emsp-3、使用预定义样式"><span class="nav-number">3.0.2.</span> <span class="nav-text">  3、使用预定义样式</span></a></li></ol></li></ol></li><li class="nav-item nav-level-4"><a class="nav-link" href="#三、Bootstrap-栅格系统"><span class="nav-number">4.</span> <span class="nav-text">三、Bootstrap 栅格系统</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#总结"><span class="nav-number">5.</span> <span class="nav-text">总结</span></a></li></ol></div>
            

          </div>
        </section>
      <!--/noindex-->
      

      

    </div>
  </aside>


        
      </div>
    </main>

    <footer id="footer" class="footer">
      <div class="footer-inner">
        <div class="copyright">&copy; <span itemprop="copyrightYear">2020</span>
  <span class="with-love">
    <i class="fa fa-user"></i>
  </span>
  <span class="author" itemprop="copyrightHolder">Shaohui</span>

  
</div>









        







        
      </div>
    </footer>

    
      <div class="back-to-top">
        <i class="fa fa-arrow-up"></i>
        
      </div>
    

    

  </div>

  

<script type="text/javascript">
  if (Object.prototype.toString.call(window.Promise) !== '[object Function]') {
    window.Promise = null;
  }
</script>









  












  
  
    <script type="text/javascript" src="/lib/jquery/index.js?v=2.1.3"></script>
  

  
  
    <script type="text/javascript" src="/lib/fastclick/lib/fastclick.min.js?v=1.0.6"></script>
  

  
  
    <script type="text/javascript" src="/lib/jquery_lazyload/jquery.lazyload.js?v=1.9.7"></script>
  

  
  
    <script type="text/javascript" src="/lib/velocity/velocity.min.js?v=1.2.1"></script>
  

  
  
    <script type="text/javascript" src="/lib/velocity/velocity.ui.min.js?v=1.2.1"></script>
  

  
  
    <script type="text/javascript" src="/lib/fancybox/source/jquery.fancybox.pack.js?v=2.1.5"></script>
  


  


  <script type="text/javascript" src="/js/src/utils.js?v=5.1.4"></script>

  <script type="text/javascript" src="/js/src/motion.js?v=5.1.4"></script>



  
  


  <script type="text/javascript" src="/js/src/affix.js?v=5.1.4"></script>

  <script type="text/javascript" src="/js/src/schemes/pisces.js?v=5.1.4"></script>



  
  <script type="text/javascript" src="/js/src/scrollspy.js?v=5.1.4"></script>
<script type="text/javascript" src="/js/src/post-details.js?v=5.1.4"></script>



  


  <script type="text/javascript" src="/js/src/bootstrap.js?v=5.1.4"></script>



  


  




	





  





  










  <script src="//cdn1.lncld.net/static/js/3.0.4/av-min.js"></script>
  <script src="//unpkg.com/valine/dist/Valine.min.js"></script>
  
  <script type="text/javascript">
    var GUEST = ['nick','mail','link'];
    var guest = 'nick,mail,link';
    guest = guest.split(',').filter(item=>{
      return GUEST.indexOf(item)>-1;
    });
    new Valine({
        el: '#comments' ,
        verify: false,
        notify: false,
        appId: '3Q9JSwomPnFzEL7XsxUM57gR-gzGzoHsz',
        appKey: 'TTCatE57NFJMvykyoop9lY5i',
        placeholder: '留下宝贵意见',
        avatar:'mm',
        guest_info:guest,
        pageSize:'10' || 10,
    });
  </script>



  

  <script type="text/javascript">
    // Popup Window;
    var isfetched = false;
    var isXml = true;
    // Search DB path;
    var search_path = "search.xml";
    if (search_path.length === 0) {
      search_path = "search.xml";
    } else if (/json$/i.test(search_path)) {
      isXml = false;
    }
    var path = "/" + search_path;
    // monitor main search box;

    var onPopupClose = function (e) {
      $('.popup').hide();
      $('#local-search-input').val('');
      $('.search-result-list').remove();
      $('#no-result').remove();
      $(".local-search-pop-overlay").remove();
      $('body').css('overflow', '');
    }

    function proceedsearch() {
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay"></div>')
        .css('overflow', 'hidden');
      $('.search-popup-overlay').click(onPopupClose);
      $('.popup').toggle();
      var $localSearchInput = $('#local-search-input');
      $localSearchInput.attr("autocapitalize", "none");
      $localSearchInput.attr("autocorrect", "off");
      $localSearchInput.focus();
    }

    // search function;
    var searchFunc = function(path, search_id, content_id) {
      'use strict';

      // start loading animation
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay">' +
          '<div id="search-loading-icon">' +
          '<i class="fa fa-spinner fa-pulse fa-5x fa-fw"></i>' +
          '</div>' +
          '</div>')
        .css('overflow', 'hidden');
      $("#search-loading-icon").css('margin', '20% auto 0 auto').css('text-align', 'center');

      $.ajax({
        url: path,
        dataType: isXml ? "xml" : "json",
        async: true,
        success: function(res) {
          // get the contents from search data
          isfetched = true;
          $('.popup').detach().appendTo('.header-inner');
          var datas = isXml ? $("entry", res).map(function() {
            return {
              title: $("title", this).text(),
              content: $("content",this).text(),
              url: $("url" , this).text()
            };
          }).get() : res;
          var input = document.getElementById(search_id);
          var resultContent = document.getElementById(content_id);
          var inputEventFunction = function() {
            var searchText = input.value.trim().toLowerCase();
            var keywords = searchText.split(/[\s\-]+/);
            if (keywords.length > 1) {
              keywords.push(searchText);
            }
            var resultItems = [];
            if (searchText.length > 0) {
              // perform local searching
              datas.forEach(function(data) {
                var isMatch = false;
                var hitCount = 0;
                var searchTextCount = 0;
                var title = data.title.trim();
                var titleInLowerCase = title.toLowerCase();
                var content = data.content.trim().replace(/<[^>]+>/g,"");
                var contentInLowerCase = content.toLowerCase();
                var articleUrl = decodeURIComponent(data.url);
                var indexOfTitle = [];
                var indexOfContent = [];
                // only match articles with not empty titles
                if(title != '') {
                  keywords.forEach(function(keyword) {
                    function getIndexByWord(word, text, caseSensitive) {
                      var wordLen = word.length;
                      if (wordLen === 0) {
                        return [];
                      }
                      var startPosition = 0, position = [], index = [];
                      if (!caseSensitive) {
                        text = text.toLowerCase();
                        word = word.toLowerCase();
                      }
                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  
  

  

  

  

</body>
</html>
